Area mountains are easy to track miles...usually. 8768 Four Mile Canyon is 8.7 miles up the canyon from Boulder Canyon Drive. You are about 10-12 miles from Downtown Boulder/Pearl Street. But it is 8.7+ miles of mountain roads. Travel time varies by conditions. 25 minutes on a clear day.
However, this property is not for sale. For some reason we often see old listings on Trulia. It makes no sense and we report these things to them. As local trulia agent, it's frustrating that questions come in about properties that are NOT for Sale. It sold to the current owners in 2011.
If you are interested in a current search of the close in Boulder Mountains, please contact me via email or here on trulia and I would be glad to help. I can assure you that the properties I send to you, or any other agent sends from the MLS...will be accurate and updated. Thanks for your question.